Devops Blog – Openstack, Openshift,- Docker, Kubernetes, Swarm, Linux, Windows Stacks – Mongodb, An occasional opinion
Views: 1045I am investigating why dpdk doesn’t work inside an instance. The OpenStack platform, specifically Neutron (the networking component), uses the concepts of “ports” in order to connect the various cloud instances to different networks and the corresponding virtual networking devices like Neutron routers, firewalls etc. The default security on these ports is quite restrictive (and …
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Views: 2668Enable the Windows Subsystem for Linux ^ Before we start anything and install the Linux distribution package for WSL, make sure you enable the “Windows Subsystem for Linux” optional feature on your machine. Running the following command from your PowerShell console will enable this feature. Open PowerShell as an administrator and run: 1 Enable-WindowsOptionalFeature -Online …
Continue reading “Running the AWS CLI and Python on Windows 10 in a Linux Bash shell – 4sysops”
Views: 2527 Login via console to your failed openstack deployment This is a copy of a blog that I wrote where I work at Octopus Computer Solutions While installing Redhat Openstack on Baremetal with lots of complicated networking, you might need to access Linux via the console. Redhat images do not come with a default …
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Views: 1166Have you been feeling like Ai apps respond like 5 year olds? Medicine is based on statistics not theory. after eight years of waiting with little in the way of results, several doctors told IEEE Spectrum that they’re getting fed up — bad news for IBM, but also a potential inflection point for the …
Views: 7885Not so charming, mega spam! Tip #6: Using Public Anti-Spam Blacklists There are spam emails that are sent from servers that has a valid hostname, valid PTR record and can pass through grey listing. In this case, you can use blacklisting to reject spam. There are many public anti-spam blacklists online. You can use …
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Views: 1122Openstack sets your hostname with cloud init on each boot. When you create the instance, you should assign it a name with full FQDN. This is absolutely required by Openshift. I did the following: Check out the Original of this article from my blog at work: Octopus Computer Solutions Hostnames and FQDN are …
Views: 10214Setup disconnected Docker registry for Rhosp Setup disconnected Docker registry for Rhosp 13 Pre-requisites:1. Server for registry that has 2 nics to connect to internet and disconnected servers2. Director configured with latest minor release3. Current Redhat subscription 4. Hundreds of GB free, preferably a TB. It is wise to have /var as a separate mounted …
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Views: 2598 Install Dnsmasq which is the lightweight DNS forwarder and DHCP Server Software. [1] Install Dnsmasq. [root@dlp ~]# yum -y install dnsmasq [2] Configure Dnsmasq. [root@dlp ~]# vi /etc/dnsmasq.conf # line 19: uncomment (never forward plain names) domain-needed # line 21: uncomment (never forward addresses in the non-routed address spaces) bogus-priv # line 41: uncomment (query …
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Views: 472YAML Files YAML files are central to installing and upkeep of the Openstack. YAML stands for Yet Another Markup Language. It is considered to be human readable too. Columns for subcategories on new lines are set spaces. Non-standard characters can also cause errors. It is not always clear what the errors are. Openstack scripts …
Views: 571Open Virtual Switch was initially conceived in a university environment, with a flow-based model providing the development primitive, and a central controller determining what those flows actually looked like. The use of OVS as a virtual switch in the IaaS market (and to be specific, in the OpenStack IaaS market) came about because the …
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Views: 2946 Understanding and confuting Image Streams is central for getting Openshift to work as you need it to work, with images and code that you desire. Over the course of the past few weeks, I have been gathering feedback around Image Streams. This feature can cause a lot of misunderstanding and confusion, even for …
Views: 481Here are some common concepts that need to be running on your systems, in order to be relavent: Openshift microservices docker kubernetes pods Work with Docker as microservices saves compute recources, However, it requires re-thinking how development is done. Microservices also enable Continuous Integration of changes to large applications. Red Hat OpenShift is an …
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Views: 542Hostnames and FQDN are often far from what you desire. Very often in the cloud, be it Openstack, Amazon, Azure or GC, The default hostname is not what you need. When you change the name, it often reverts after reboot. This is due to Cloud Init run at every boot. Change a Red Hat …
Continue reading “בלוגים – Howto: Set FQDN of a Redhat Linux cloud instance”